LINXEAX SOCIETY OF LOXDON. 7 



Wetherby, Yorkshire. From the time of John Evelyn this oak 

 has been described, measured, and its age guessed at. Mr. Clayton, 

 in a printed summary of 22 pages, gives an account of the various 

 observers who have mentioned the oak in question, and many of 

 the photographs are designed for comparison with other remark- 

 able trees, amongst them the Crowhurst Yew in Sussex, the great 

 Chestnut at Tortworth, and the Greendale Oak in Welbeck Park. 

 In 1S93 careful measurements and photographs were made of the 

 tree, on four different visits in January, April, June, and October. 

 The author's deduction from these data is, that the age of the 

 tree has been greatly over-estimated ; his own belief being that 

 oOO years is the extreme limit of its age, from sapling to its 

 present decrepitude and decay. 



Copies of the photographs and text have been limited to ten ; this 

 copy being presented to the Society through Mr. William "West, 

 E.L.S, The donor was voted the special thanks of the Society 

 for his gift. 



Dr. Geoege Hexdeesox, F.L.S., offered " Some Eemarks on 

 the possible uses of Essential Oils in the Economy of Plant-life." 

 (See p. 46.) 



A discussion followed in which Mr. T. Christy, Mr. "\V. C. 

 Worsdell, Mr. G. Massee, Mr. A. P. Young, Prof. J. Percival, 

 and the President took part, and Dr. Henderson replied. 



The following papers were read : — 



1. " On the Electric Pulsation accompanying Automatic Move- 

 ments in Desmodium cfi/mns." By Prof. Jagadis Chunder Bose, 

 CLE. (Communicated by the President.) 



2. " On Cerataphis Latanke, a peculiar Aphid." By Miss 

 Alice L. Embleton, B.Sc. (Communicated by Prof. G. B. Howes, 

 Sec. L.S.) 



3. " On Specialization of Parasitism in the Erysiphacese." By 

 Mr. Ernest S. Salmon, F.L.S. 



March oth, 1903. 

 Prof. Sydney H. Yines, E.E.S., President, in the Chair. 



The Minutes of the last Meeting were read and confirmed. 



Mr. Joseph Burtt Davy, Dr. Felix Eugen Fritsch, Mr. Eobert 

 Hall, and Mr. George Whitfield Smith were elected, and 

 Mr. Arthur Gro^e was admitted a Fellow. 



Rev. T. E.E. Stebbing, F.E.S., exhibited a collection of Spiders 

 and Wasps from Singapore, made by Mr. C. J. Saunders. 



(1) Spiders found in 11 clay cells built between the boards of 

 a thin book standing upright on a book-shelf ; the space } inch 

 broad by 5 inch high, and 4| to 5 inches long. Mr. Saunders 



